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20th July 2014, 10:51 PM #1Senior Member
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Hand taper pin reamers, spiral flute v straight flute
I need to ream a couple of flogged 1/2" holes to take a #9 taper pin. The job is a 3.5"dia cast iron boss with a 1.5" 1045 steel shaft.
Looking on ebay I see c-tool at the moment has both straight and spiral flute taper pin reamers, is one better than the other for what I need to do?
Briefly I looked at prices for Suttons #9 taper reamers, $200+.
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20th July 2014, 11:10 PM #2Cba
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21st July 2014, 12:05 AM #3SENIOR MEMBER
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Bob out of curiosity how much are both reamers? I didn't buy some when I had the chance and when I went back to my friendly Singapore tapered reamer lady to get them she'd gone and shifted out to the whoop whoop somewhere, and I don't feel inclined to go chase her!
I've only ever used straight reamers so can't help you on the difference I'm afraid. What Chris has said is quite correct, straight out if the textbook. I've heard the spirals work a little smoother, but that's just hearsay and I have no experience with them. In this case I'd probably stick with straight as they would be easier to set up to sharpen, but I confess I sometimes get chatter on larger reamers so wouldn't mind trying spirals.
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21st July 2014, 06:34 AM #4SENIOR MEMBER
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Hi Bob,
I am pretty sure it only makes a big difference if reaming from a step drilled hole but if you are just bringing a hole out to a larger size, it should be ok.
I have this information from theoretical knowledge and practical experience
I am also quite sure I have a #9 reamer if you would like to borrow it as well.
Even though the entire contents of my workshop are in the corner of a garage, I can still access it easily. Don't worry about damaging it as I got them from a bloke who 'thought I might be able to use these things'.
He didn't want any money for them.
PM me if you want to borrow it. It would be less expensive for what could be a one off use.
Phil
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21st July 2014, 09:58 AM #5SENIOR MEMBER
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Well based on that, do you find the spiral tapered reamers worth the extra expense in terms of performance?
I've never tried sharpening a spiral reamer, but it think I'd need to make up a special finger to get enough clearance to sharpen them, not a big deal I suppose, but just another thing to worry about when grinding.
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21st July 2014, 02:51 PM #6SENIOR MEMBER
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I'd buy spiral ones if the price difference wasn't extortionate (ie more than double). Chances of using them enough for them to need resharpening in my lifetime - slim to none.
Personally I use roll pins though I do recognise that there are occasions where a taper pin is a better choice.
PDW
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21st July 2014, 06:47 PM #7SENIOR MEMBER
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21st July 2014, 09:10 PM #8SENIOR MEMBER
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Ok thanks guys I'll give the spiral reamers a go then. I've been meaning to buy some more regular hand reamers in sizes I don't have, and Alan just very kindly informed me of an alternate Singapore Reamer Lady to my old friend, Kitty I think her name was from memory. Kitty the reamer lady, though she was good for taps and dies too. I'd never sharpen them so it wouldn't matter what type I bought, but larger tapers I'd give them a touch up if they ever needed it. Never say never in the sharpening dept. Peter, you just never know what jobs may be around the corner!
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21st July 2014, 09:31 PM #9SENIOR MEMBER
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21st July 2014, 10:06 PM #10SENIOR MEMBER
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21st July 2014, 10:32 PM #11Senior Member
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Thanks for the kind offers of assistance, steamwhisperer and stix012.
After dismantling the job, what were thought to be flogged holes turn out to be f....d holes. Plan B is being formulated.
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22nd July 2014, 09:30 PM #12SENIOR MEMBER
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